Polar and Rectangular coordinates

need help with these two problems:

1. For a give rectangle coordinate, find two pairs of polar coordinates for the poing. One pair satisfies r≥0 and 0≤theta<2pi, and the second pair satisies r≥0 and -2pi<theta≤0
for the problem (-3, 3sqrt(3))

2. Identify the curve by transforming Rsin(theta)=4 into rectangular coordinates.
So far, I converted it to 4csc(theta) but now i'm stuck.

1. For a given rectangle coordinates, find two pairs of polar coordinates for the point.
One pair satisfies r > 0 and 0 ≤ θ < 2π,
and the second pair satisfies r ≥ 0 and -2π < θ ≤ 0
for the problem (-3, 3√3)